[PATCH v7 15/16] drm/amdgpu: Verify DMA opearations from device are done

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



In case device remove is just simualted by sysfs then verify
device doesn't keep doing DMA to the released memory after
pci_remove is done.

Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@xxxxxxx>
Acked-by: Christian König <christian.koenig@xxxxxxx>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index 83006f45b10b..5e6af9e0b7bf 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -1314,7 +1314,13 @@ amdgpu_pci_remove(struct pci_dev *pdev)
 	drm_dev_unplug(dev);
 	amdgpu_driver_unload_kms(dev);
 
+	/*
+	 * Flush any in flight DMA operations from device.
+	 * Clear the Bus Master Enable bit and then wait on the PCIe Device
+	 * StatusTransactions Pending bit.
+	 */
 	pci_disable_device(pdev);
+	pci_wait_for_pending_transaction(pdev);
 }
 
 static void
-- 
2.25.1

_______________________________________________
amd-gfx mailing list
amd-gfx@xxxxxxxxxxxxxxxxxxxxx
https://lists.freedesktop.org/mailman/listinfo/amd-gfx




[Index of Archives]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux